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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Skin Diseases and Disorders01:23

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...
Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...

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Related Experiment Video

Updated: May 17, 2026

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
12:59

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes

Published on: September 26, 2013

[Th17 cells and skin diseases].

Yoshiki Tokura1

  • 1Department of Dermatology, Hamamatsu University School of Medicine.

Nihon Rinsho Men'Eki Gakkai Kaishi = Japanese Journal of Clinical Immunology
|November 6, 2012
PubMed
Summary

T helper 17 (Th17) cells are vital for host defense but can drive autoimmune diseases. Increased Th17 cells are linked to skin conditions like psoriasis, atopic dermatitis, and drug eruptions.

Area of Science:

  • Immunology
  • Dermatology
  • Cellular Biology

Background:

  • T helper 17 (Th17) cells are critical for immune responses and host defense.
  • Dysregulation of Th17 cell activity is implicated in various autoimmune and inflammatory conditions.
  • Th17 cells, co-expressing IL-22, interact with keratinocytes via IL-22 receptors, influencing skin immunity.

Purpose of the Study:

  • To explore the role of Th17 cells in the pathogenesis of skin disorders.
  • To investigate the association between Th17 cell levels and specific dermatological conditions.
  • To understand the contribution of Th17 cells to inflammatory skin diseases.

Main Methods:

  • Analysis of Th17 cell populations in patients with skin diseases.
  • Correlation studies assessing Th17 cell percentages with disease severity.

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In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

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Last Updated: May 17, 2026

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
12:59

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes

Published on: September 26, 2013

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse
07:46

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

Published on: October 25, 2024

  • Review of existing literature on Th17 cell involvement in skin inflammation.
  • Main Results:

    • Th17 cells are increasingly recognized for their role in the pathogenesis of skin disorders, notably psoriasis.
    • Elevated percentages of Th17 cells are observed in the peripheral blood of patients with atopic dermatitis (AD).
    • Increased circulating Th17 cells are also associated with the severity of AD and are found in patients with drug eruptions.

    Conclusions:

    • Th17 cells play a significant role in the immune response within the skin.
    • Aberrant Th17 cell activity contributes to the development and progression of inflammatory skin diseases.
    • Monitoring Th17 cell levels may offer insights into disease activity and severity in conditions like AD and psoriasis.